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Many time series database applications require processing and analyzing database sequences where the focus is on finding the patterns and trends in sequence data. In this paper, we propose a new approach based on the observation that finding sequential patterns in databases is somehow similar to searching for a phrase in the text. However instead of searching for sequence of letters usually from finite...
Focusing on using Oracle to implement the differentiation of spatial topological relations between lines and regions, an algorithm based on Oracle Spatial Topology Data Model and the 9-intersection model is designed to determine the nine elements of the 9-intersection matrix, which can be used to differentiate the 19 kinds of spatial topological relations between a line and a region. Three elements...
This paper presents a new association rule mining algorithm called MFP. The MFP algorithm can convert a transaction database into an MFP_tree through scanning the database only once, and then do the mining of the tree. The MFP algorithm usually is more efficient than FP_growth. We used it for mining some formulas of synthetic perfume essence and obtained the success.
Mass for the current space-time multi-source heterogeneous data in the organization, management, integration difficulties, for traditional methods in the data conversion process and other issues caused data loss, Combining the characteristics of ocean space-time data, This paper presents a new seamless integration of massive multi-source heterogeneous space-time data technology (SIMMHS).The technology...
In this paper, we proposed a algorithm based on topological operator to solve the problem of multi-scale GIS display. It included two primary steps, one was the computation of topological operator the other was building new map layer by this algorithm. The spatial relations were figured out by the operator of touch. If the two geometries were adjacent and the attributes were coincident, they would...
It is a direction to build automatic scoring system in simulation training in the combination of programming techniques, expert systems theory and database technology. This paper presents the basic principles and general methodology to build an automatic scoring system, and introduces the main content and focus of the work to design a system, and illustrates the function of each module. And then,...
On the basis of analyzing the newly time sequence research achievement nowadays, several definitions on seismological zone relativity are put forward in this paper for integrating the large amount of history earthquake source data and the experimental expert knowledge in seismological field. At the same time, the time sequence similarity-matching model of the relevant seismological zone is presented,...
SQL injection is an attack technique used to exploit code by altering back-end SQL statements through manipulating input. This paper proposes a novel methodology of preventing SQL injection attacks by building a protective adaptive shell. The protective shell is located between the application and the back-end database and has three layers to block illegal SQL statements. It could be adaptive after...
This paper presents multi-user desktop application which can be implemented in any academic institution to record and manage all sort of permanent and day to day statistical data of students and staff. Other than this data, the paper also presents the computerized solution to save all the necessary documents/letters/certificates in the database through multi page high speed scanning system which can...
At first, in this paper AHP and Fuzzy Synthetic Evaluation Method are abstracted with Mathematics tools and packaged then evaluation index is filled by the system administrator with semi-automatic mode applying open database technology the filled data are related to the packaged algorithm. Finally the paper implements the evaluation based on B/S.
Sys-log message is the importance data which could present information about internet source-destination connection of all IP address nodes in each network server. These sys-log messages must be securely kept in database in case of being referenced, such as legal requesting. The objective of this research was to develop a security protocol of system log message database manipulation. Message was split...
When digging association rules among items, the items are dealt in an equal way. However, it is usually not happen in databases in the real world. Different items always have different importance. To reflect them, The way of draw weight into items and use weight association rules can solve the problem. But weighted association rules arithmetic of these research based on Apriori arithmetic at the present,...
Expert system development environment directly affects the efficiency and quality of development of expert system. According to modular machine tool spindle box's design complexity and design goals of multiple solutions, it identifies modular machine tool spindle box expert system platform is the Pro/Engineer. Its development tools are Visual C++6.0 and Pro/Toolkit, its database management system...
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